A:abundant
B:diverse
C:extinct
D:fragile
说说毛细血管适合物质交换的特点。
下列实数中,是无理数的是( )
②折叠后∠ABE和∠CBD一定相等;
③折叠后得到的图形是轴对称图形;
④△EBA和△EDC一定是全等三角形.其中正确的有( )
如图是由5个相同的小正方体组成的立体图形,这个立体图形的俯视图是( )
A.Where did you go over the winter holiday?
B.How tall are you?
C.Did you see a film last night?
D.You didn't come to school. What happened?
E.Are you all right?
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